diff options
author | Lino Sanfilippo <LinoSanfilippo@gmx.de> | 2010-11-24 18:26:04 +0100 |
---|---|---|
committer | Eric Paris <eparis@redhat.com> | 2010-11-29 15:31:11 -0500 |
commit | 9f71741c75e5206e1fea72ddf2adf5661105444d (patch) | |
tree | 2787a6307622354c3077cfb3d25b6fb4ad8860f9 /fs | |
parent | 300d64b618dbb3e3fd8985e5d181e783aa47d307 (diff) |
fanotify: Dont try to open a file descriptor for the overflow event
We should not try to open a file descriptor for the overflow event since this
will always fail.
Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/notify/fanotify/fanotify_user.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index eddad5530886..5d2e68370950 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -121,6 +121,8 @@ static int fill_event_metadata(struct fsnotify_group *group, struct fanotify_event_metadata *metadata, struct fsnotify_event *event) { + int ret = 0; + pr_debug("%s: group=%p metadata=%p event=%p\n", __func__, group, metadata, event); @@ -128,9 +130,15 @@ static int fill_event_metadata(struct fsnotify_group *group, metadata->vers = FANOTIFY_METADATA_VERSION; metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS; metadata->pid = pid_vnr(event->tgid); - metadata->fd = create_fd(group, event); + if (unlikely(event->mask & FAN_Q_OVERFLOW)) + metadata->fd = FAN_NOFD; + else { + metadata->fd = create_fd(group, event); + if (metadata->fd < 0) + ret = metadata->fd; + } - return metadata->fd; + return ret; } #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS @@ -264,7 +272,7 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, if (ret < 0) goto out; - fd = ret; + fd = fanotify_event_metadata.fd; ret = prepare_for_access_response(group, event, fd); if (ret) goto out_close_fd; @@ -278,7 +286,8 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, out_kill_access_response: remove_access_response(group, event, fd); out_close_fd: - sys_close(fd); + if (fd != FAN_NOFD) + sys_close(fd); out: #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS if (event->mask & FAN_ALL_PERM_EVENTS) { |